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Qingyang Quanzhou archaeology Sun Hong School of Archaeology, Peking University Yi ShuFeng
04-24
![Visit the Iron Smelting Site of Caopu under Qingyang: The legacy of the "iron bone" of the Song Dynasty continues to this day[fig]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)